The Nozaki Laboratory, Department of System Design Engineering, Faculty of Science and Technology, Keio University, has adopted Matsusada Precision's high-voltage power supplies HAR series (AU series) as they work to establish a new propulsion principle using high voltage phenomena and build an experimental vehicle to realize a quiet, high-speed "Flying Car" without propellers powered by ion wind. The high-voltage power supply "HAR series (AU series) " from Matsusada Precision has been adopted. We asked him about the details.